Re: Wireless temperature & humidity measurement
On Fri, 14 Jul 2023 09:27:12 +0200
Bruno Kleinert <fuddl@debian.org> wrote:
> Hello,
>
> I'm looking for a wireless way to measure temperature and humidity
> indoor with hardware off the shelf and software included in Debian 12
> bookworm.
>
> Sensors --> Radio --> Receiver --> Any typical PC interface, e.g.,
> USB, Ethernet.
>
> I don't need a visual interface, but plan to process measured values
> in shell scripts.
>
> Do you have any hardware recommendations and can you share experience?
>
>
I've used a DHT22 for a few years for this.
https://www.sparkfun.com/datasheets/Sensors/Temperature/DHT22.pdf
Hardware off the shelf but not software. I have a pair of XBee (Zigbee
compatible) radio transceivers, an Arduino at the sensor end to format
and time the data a bit, and a serial-USB converter to put the receiver
output into my server. Then a bit of scripting to log the received data,
and a bit of PHP to make a 7-day graph web page of T and H. Boot script
to set up the serial port and initiate logging on reboot.
There are probably better and cheaper ways to do it now. I had a spare
pair of XBees, but Chinese 433MHz PCBs are much cheaper. On the other
hand, you need to add your own validation to make sure you're not
trying to interpret nearby doorbell rings and weather stations. The
XBees have serial numbering and other features built in, in fact you
need the manufacturer's application (Windows only, of course) to
configure them.
--
Joe
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